Today at the Holiday Inn Select in Indianapolis, Purdue professors and staff will team up with the National White Collar Crime Center to teach 110 Indiana police officers about e-mail forensics. The training session is part two of a previous session that taught officers about examining hard drives on computers, said Marcus Rogers, associate professor of computer technology and one of the trainers of the class. The session will focus on using e-mail as evidence to help law enforcement solve crimes faster and more efficiently.